Gas Supply - Empire Comfort Systems DV25IN33LN-3 Installation Instructions And Owner's Manual

If the factory factory built fireplace has no gas access hole(s) provided,
an access hole of 1.5 in (37.5 mm) or less may be drilled through
the lower sides or bottom of the firebox in a proper workmanship-like
manner. This access hole must be plugged with non-combustible
insulation after the gas supply line has been installed.
The gas pipeline can be brought in through the right or left side of
the appliance. The insert has a Flexline with shutoff valve located
on the right side when facing the unit. See Figures 4 and 6. Consult
the current National Fuel Gas Code, ANSI Z223.1 CAN/CGA-B149
(.1 or .2) installation code.
Recommended Gas Pipe Diameter
Pipe Length Schedule 40 Pipe
Inside Diameter
Nat.
0-10ft 1/2"
0-3m 12.7mm
11-40ft 1/2"
4-12m 12.7mm
41-100ft 1/2"
13-30m 12.7mm
101-150ft 3/4"
31-46m 19mm
NOTICE: Never use plastic pipe. Check to confirm whether your
local codes allow copper tubing or galvanized.
NOTICE: Since some municipalities have additional local codes, it
is always best to consult your local authority and installation code.
The use of the following gas connectors is recommended:
— ANS Z21.24 Appliance Connectors of Corrugated Metal Tubing
and Fittings.
— ANS Z21.45 Assembled Flexible Appliance Connectors of Other
Than All-Metal Construction
The above connectors may be used if acceptable by the authority
having jurisdiction. The state of Massachusetts requires that a
flexible appliance connector cannot exceed three feet in length.
35657-4-1015

GAS SUPPLY

Tubing, Type L
Outside Diameter
L.P. Nat.
3/8" 1/2"
9.5mm 12.7mm 9.5mm
1/2" 5/8"
12.7mm 15.9mm 12.7mm
1/2" 3/4"
12.7mm 19mm 12.7mm
1/2" 7/8"
12.7mm 22.2mm 1.9 mm
Figure 4
Natural Gas
LP (Propane)
Natural Gas
LP (Propane)
Installing a New Main Gas Cock
Each appliance should have its own manual gas cock.
L.P.
A manual main gas cock should be located in the vicinity of the unit.
3/8" Where none exists, or where its size or location is not adequate,
contact your local authorized installer for installation or relocation.
1/2"
Compounds used on threaded joints of gas piping shall be resistant
to the action of liquefied petroleum gases. The gas lines must be
checked for leaks by the installer. This should be done with a soap
1/2"
solution watching for bubbles on all exposed connections, and if
unexposed, a pressure test should be made.
3/4"
Never use an exposed flame to check for leaks. Appliance must
be disconnected from piping at inlet of control valve and pipe
capped or plugged for pressure test. Never pressure test with
appliance connected; control valve will sustain damage!
A gas valve and ground joint union should be installed in the gas
line upstream of the gas control to aid in servicing. It is required by
the National Fuel Gas Code that a drip line be installed near the gas
inlet. This should consist of a vertical length of pipe tee connected
into the gas line that is capped on the bottom in which condensation
and foreign particles may collect.
GAS SUPPLY PLUMBING
MANUAL
SHUT-OFF VALVE
GAS SUPPLY
INLET
1/8 NPT PLUGGED
HOLE FOR
TEST GAGE
Gas Supply Pressure (inches w.c.)
Minimum Normal Maximum
4.5" 7.0" 14.0"
10.8" 11.0" 14.0"
Manifold Pressure (inches w.c.)
Normal (HI)
3.5"
10.0"
3"
MINIMUM
Figure 5
TO CONTROL
VALVE
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